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A "Flamenco" trumpet vine (Campsis radicans "Flamenco") that holds back its blossoms calls for some investigative work and care adjustments. Under the right conditions, "Flamenco" pours out an abundance of flaming, trumpet-shaped flowers. The vine doesn't ask much in return, but it does have basic, bloom-boosting needs. Understanding what your "Flamenco" lacks can help you get it back on track soon.

Age and Timing

How long your "Flamenco" has been planted and the time of year both affect its ability to bloom. A plant new to its location needs time to become established before it flowers. If your vine is old, that may explain a lack of flowers, too. "Flamenco" has a lifespan of about 20 years. Older plants often stop producing blooms. With "Flamenco" ripe for flowering, the profusion of scarlet blossoms comes in early summer and continues until fall. If you expected springtime blossoms, be patient -- "Flamenco" blooms may be on their way. Note that trumpet vine is considered invasive in some areas.

Sunlight and Surroundings

Although "Flamenco" tolerates partial shade, it needs full sun to reach its blooming potential. If your "Flamenco" receives less than six hours of direct, full sun each day, the lack of sun limits the vine's blooms. The more shade the vine gets, the fewer blossoms it bears. In full shade, it may not bloom. To get "Flamenco" blossoms rolling again, transplant your vine to a sunnier spot. For a plant too large to move, you may be able to prune or remove plants and trees that are shading it.

Nutrition and Soil

"Flamenco" does best in lean soil. It adapts easily to various soil types, but thrives in acidic soil, where it readily absorbs all the nutrients plentiful blossoms need. In alkaline soil, acid-building organic matter, such as peat moss helps lower soil pH. A pine needle mulch may help lower pH as it decomposes over time. If you fertilized "Flamenco," your well-intentioned efforts may be to blame. Avoid using any fertilizers in the area, particularly high-nitrogen products you may use in nearby lawns. Nitrogen stimulates green growth at the expense of blossoms.

Pruning and Maintenance

Hardy in U.S. Department of Agriculture plant hardiness zones 5 through 10, "Flamenco" needs proper pruning to promote blooms. Flowers appear on new growth from the current year. Pruning new spring growth removes summer's flower buds. Large, overgrown vines need heavy pruning to promote new flower-bearing growth. Plan the job for late winter, before growth begins. Wear gloves, protective clothing and eyewear when working with trumpet vines. Skin reactions can result from contact. Use sharp bypass pruners, and sterilize your blades by wiping them with rubbing alcohol before and after your work to prevent the spread of disease.

About the Author

Jolene Hansen is a lifelong gardening enthusiast and former horticulture professional. She is passionate about reshaping the way people experience gardens and gardening. Hansen's work appears regularly in consumer and trade publications, as well as numerous internet gardening and lifestyle channels.